#define _CRT_SECURE_NO_WARNINGS
/*********************************
* Class: MAGSHIMIM C2            *
* Week 5                         *
* HW  solution                   *
**********************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define PRO_OP 1
#define CON_OP 2
#define PRINT_OP 3
#define EXIT_OP 4

#define STR_LEN 50
#define MAX_LIST_LENGTH 10

typedef struct reasonList
{
    char* listName;
    char* reasons[MAX_LIST_LENGTH];
    int numReasons;
} reasonList;


void initList(reasonList* list, char* name);
void addReason(reasonList* list);
void printList(reasonList list);
int menu(void);
void myFgets(char str[], int n);
void deleteList(reasonList list);

int main(void)
{
    char dillema[STR_LEN] = { 0 };
    int op = 0;

    reasonList proList;
    initList(&proList, "PRO");
    reasonList conList;
    initList(&conList, "CON");

    printf("What is your dillema?\n");
    myFgets(dillema, STR_LEN);

    while (op != EXIT_OP)
    {
        op = menu();

        switch (op)
        {
        case(PRO_OP):
            addReason(&proList);
            break;
        case(CON_OP):
            addReason(&conList);
            break;
        case(PRINT_OP):
            printf("Your dillema:\n");
            printf("%s\n\n", dillema);

            printList(proList);
            printList(conList);
            break;
        case(EXIT_OP):
            deleteList(proList);
            deleteList(conList);
            break;
        }
    }
    printf("Good luck!\n");
    getchar();
    return 0;
}

/*
Function will initialize a reason list
input: the list to init, and its name
output: none
*/
void initList(reasonList* list, char* listName)
{
    list->listName = listName;
    list->numReasons = 0;
    list->reasons[0] = 0;
}

/*
Function will add a reason to the list
input: the list to add to and its name
output: none
*/
void addReason(reasonList* list)
{
    char* input = (char*)malloc(STR_LEN * sizeof(char));

    printf("Enter a reason to add to list %s:\n", list->listName);

    myFgets(input, STR_LEN);

    list->reasons[list->numReasons] = input;
    list->numReasons++;
}

/*.
Function will print a list of reasons
input: the list
output: none
*/
void printList(reasonList list)
{
    int i = 0;

    printf("List %s\n"
        "----------\n", list.listName);
    for (i = 0; i < list.numReasons; i++)
    {
        printf("%s\n", list.reasons[i]);
    }
    printf("\n");
}

/*
Function shows menu and returns user's choice
input: none
output: user's choice
*/
int menu(void)
{
    int op = 0;
    printf("Choose option:\n");
    printf("%d - Add PRO reason\n", PRO_OP);
    printf("%d - Add CON reason\n", CON_OP);
    printf("%d - Print reasons\n", PRINT_OP);
    printf("%d - Exit\n", EXIT_OP);
    scanf("%d", &op);
    while (op < PRO_OP || op > EXIT_OP)
    {
        printf("Invalid option. Try again: ");
        scanf("%d", &op);
    }
    getchar(); // clean buffer
    return op;
}

/*
Function will delete a list
input: the list to delete
output: none
*/
void deleteList(reasonList list)
{
    int i = 0;

    for (i = 0; i < list.numReasons; i++)
    {
        free(list.reasons[i]);
    }
}

/*
Function will perform the fgets command and also remove the newline
that might be at the end of the string - a known issue with fgets.
input: the buffer to read into, the number of chars to read
*/
void myFgets(char str[], int n)
{
    fgets(str, n, stdin);
    str[strcspn(str, "\n")] = 0;
}